Deshwal, A., S. Belakaria, and J. R. Doppa. “Mercer Features for Efficient Combinatorial Bayesian Optimization”. Proceedings of the AAAI Conference on Artificial Intelligence, vol. 35, no. 8, May 2021, pp. 7210-8, https://ojs.aaai.org/index.php/AAAI/article/view/16886.